Fill - Free fillable Chapter ha te Tire, Wheel, and Wheel Bearing PDF form

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Name _________________________________________________________________________ Date _________________________

Instructor _____________________________________________________________________ Score ________________________

Chapter

73

ha

p

te

r

hapter

Objective: After studying this chapter, you will be able to explain the parts, constructions, and operation of

tires and wheel assemblies.

Tires

1. What forces must a tire deliver to the surfaces on which it travels?

_______________________________________________________________________________________________________

2. Today’s tires are ﬁ lled with air, meaning they are ____. _________________________________________________

3. Today’s vehicles use (tubeless tires/inner tubes) ____. _________________________________________________

4. Explain the six basic parts of a tire.

Beads: _________________________________________________________________________________________________

_______________________________________________________________________________________________________

Body plies: _____________________________________________________________________________________________

_______________________________________________________________________________________________________

Tread: __________________________________________________________________________________________________

_______________________________________________________________________________________________________

Sidewall: _______________________________________________________________________________________________

_______________________________________________________________________________________________________

Belts: __________________________________________________________________________________________________

_______________________________________________________________________________________________________

Liner: __________________________________________________________________________________________________

_______________________________________________________________________________________________________

Tire, Wheel, and

Wheel Bearing Fundamentals

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

472 Modern Automotive Technology Workbook

5. Name three construction and design variations in tires.

_______________________________________________________________________________________________________

6. Deﬁ ne rolling resistance.

_______________________________________________________________________________________________________

7. True or False? Rolling resistance is increased by higher _________________________________________________

inﬂ ation pressure, proper tire design, and lower

vehicle weight.

8. All American passenger cars manufactured since the _________________________________________________

early 1980s have been factory equipped with ____ tires.

For questions 9–11, match the following terms and identifying phrases.

(A) Bias ply tire

(B) Radial ply tire

(C) Belted bias tire

________ 9. Has plies and belts running at different angles; the belts lie under the

tread area only.

________ 10. Has plies running at an angle from bead to bead; the angle is

reversed from ply to ply.

________ 11. Has plies running straight across the beads, with stabilizer belts

directly beneath the tread.

12. What is a beneﬁ t of the stable footprint found on a radial tire?

_______________________________________________________________________________________________________

13. Name a possible disadvantage of a radial tire.

_______________________________________________________________________________________________________

14. What do tire markings reveal?

_______________________________________________________________________________________________________

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

Chapter 73 Tire, Wheel, and Wheel Bearing Fundamentals 473

Name _________________________________________________________________________

15. Identify the two common size designations for tires.

_______________________________________________________________________________________________________

16. What does GR 78-15 mean on a tire sidewall?

G: _____________________________________________________________________________________________________

R: _____________________________________________________________________________________________________

78: ____________________________________________________________________________________________________

15: ____________________________________________________________________________________________________

17. Identify and label the three types of tire construction.

Body ply

cords run on bias

Body ply cords

run on bias

Stabilizer

belts

Stabilizer

belts

Radial cord

body plies

(A) ______________________________ (B) _______________________________ (C) ______________________________

18. The height-to-width ratio, known as the ____ ratio, is _________________________________________________

the most difﬁ cult value to understand in the tire size

designation.

19. Identify the points of measurement on a tire.

C

A

D

E

F

B

(A) _____________________________________________

(B) _____________________________________________

(C) _____________________________________________

(D) _____________________________________________

(E) _____________________________________________

(F) _____________________________________________

20. The amount of weight the tire can carry at the _________________________________________________

recommended inﬂ ation pressure is known as the

____ rating.

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

474 Modern Automotive Technology Workbook

21. A maximum recommended inﬂ ation pressure of _________________________________________________

____ psi is common for many tires.

22. What does a greater number of plies or higher ply rating generally indicate?

_______________________________________________________________________________________________________

23. What is the signiﬁ cance of DOT on the tire sidewall?

_______________________________________________________________________________________________________

24. The higher the tread wear number, the (more/less) _________________________________________________

____ resistant the tire is to wear.

25. Which tire rating provides the least traction?

_______________________________________________________________________________________________________

26. Explain tire speed ratings.

_______________________________________________________________________________________________________

27. The (inner/outer) ____ tread pattern on asymmetric _________________________________________________

tires is designed to improve cornering on dry surfaces,

_________________________________________________

while the (inner/outer) ____ tread pattern is designed

to improve traction on wet surfaces.

28. ____ tires are high-performance tires designed to _________________________________________________

rotate in a speciﬁ c direction to minimize hydroplaning.

29. Deﬁ ne hydroplaning.

_______________________________________________________________________________________________________

30. Which kind of spare tire is used on most new cars?

_______________________________________________________________________________________________________

31. True or False? Most modern spare tires are designed _________________________________________________

only for temporary use.

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Chapter 73 Tire, Wheel, and Wheel Bearing Fundamentals 475

Name _________________________________________________________________________

32. How do self-sealing tires work?

_______________________________________________________________________________________________________

33. What vehicles often receive retreads and why?

_______________________________________________________________________________________________________

34. Tires that have an extremely stiff sidewall _________________________________________________

construction so they are still usable with a loss of air

pressure are ____ tires.

35. Explain how wear bars indicate a critical amount of tread wear.

_______________________________________________________________________________________________________

36. How does a tire pressure monitoring system work?

_______________________________________________________________________________________________________

Wheels

________ 37. Varieties of wheels may be made with all of the following materials except:

(A) cast aluminum.

(B) silver.

(C) magnesium.

(D) steel.

38. True or False? Mag wheels require wheel covers. _________________________________________________

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

476 Modern Automotive Technology Workbook

39. Why is a drop-center wheel commonly used?

_______________________________________________________________________________________________________

40. A standard wheel consists of the ____ and the ____. _________________________________________________

_________________________________________________

________ 41. A ____ rim has small ridges that hold the tire beads in place.

(A) safety

(B) ridge

(C) two-piece

(D) mag wheel

42. Explain the difference between a tire blowout and a ﬂ at.

_______________________________________________________________________________________________________

Valve Stems and Cores

43. A valve stem is pressed into a hole in the wheel of _________________________________________________

a(n) ____ tire.

44. The valve ____ is a spring-loaded air valve that is _________________________________________________

threaded into the valve stem.

45. Explain what happens when the air chuck is removed from the valve stem.

_______________________________________________________________________________________________________

46. What is the function of a valve stem cap?

_______________________________________________________________________________________________________

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

Chapter 73 Tire, Wheel, and Wheel Bearing Fundamentals 477

Name _________________________________________________________________________

Lug Nuts, Studs, and Bolts

47. Explain why the inner face of the lug nut is tapered.

_______________________________________________________________________________________________________

48. What are lug studs?

_______________________________________________________________________________________________________

Wheel Weights

49. What is the function of wheel weights?

_______________________________________________________________________________________________________

Hub and Wheel Bearing Assemblies

50. Describe the three basic parts of a wheel bearing.

Outer race:

_______________________________________________________________________________________________________

Balls or rollers:

_______________________________________________________________________________________________________

Inner race:

_______________________________________________________________________________________________________

51. Describe the basic parts of a hub and tapered roller bearing assembly.

Spindle:

_______________________________________________________________________________________________________

Wheel bearings:

_______________________________________________________________________________________________________

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

478 Modern Automotive Technology Workbook

Hub:

_______________________________________________________________________________________________________

Grease seal:

_______________________________________________________________________________________________________

Safety washer:

_______________________________________________________________________________________________________

Spindle adjusting nut:

_______________________________________________________________________________________________________

Nut lock:

_______________________________________________________________________________________________________

Cotter pin:

_______________________________________________________________________________________________________

Dust cap:

_______________________________________________________________________________________________________

52. Describe the basic parts of a hub and ball or straight roller bearing assembly.

Outer drive axle:

_______________________________________________________________________________________________________

Ball bearings:

_______________________________________________________________________________________________________

Steering knuckle (bearing support):

_______________________________________________________________________________________________________

Driving hub:

_______________________________________________________________________________________________________

Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website.

Chapter 73 Tire, Wheel, and Wheel Bearing Fundamentals 479

Name _________________________________________________________________________

Axle washer:

_______________________________________________________________________________________________________

Hub or axle locknut:

_______________________________________________________________________________________________________

Grease seal:

_______________________________________________________________________________________________________

53. Name the components of the driving hub and wheel bearing assembly.

C

D

E

F

A

B

(A) _____________________________________________

(B) _____________________________________________

(C) _____________________________________________

(D) _____________________________________________

(E) _____________________________________________

(F) _____________________________________________

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